/Engine/Plugins/Online/OnlineSubsystemSteam/Source/Public/OnlineSubsystemSteam.h
virtual [FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) AddOnSteamServerLoginCompletedDelegate_Handle ( const [FOnSteamServerLoginCompletedDelegate](API\Plugins\OnlineSubsystemSteam\FOnSteamServerLoginCompletedDele-) & Delegate )